Process for the preparation of aniline compounds
AssigneeSyngenta Crop Protection AG
InventorsGottfried Seifert, Thomas Rapold
Life of this patent
Estimating the term…
Abstract
A process for the preparation of aniline compounds of formula 1 wherein n and R are as defined in claim 1, by reacting nitro compounds of formula 2 wherein n and R are as defined, with hydrazine at elevated temperature in the presence of an aqueous base. The compounds of formula I are suitable as intermediates in the preparation of herbicides of the isobenzofuranone type.
Claims4
A process for the preparation of an aniline compound of formula
- 5
- wherein
- n is an integer from 1 to 5 and
- R is hydrogen, alkyl, hydroxyalkyl, alkylamino, dialkylamino, alkenyl, alkynyl, alkoxy, alkylthio, phenyl, naphthyl, phenoxy, phenylthio, halogen, amino, hydroxy, mercapto, carboxyl, sulfo, nitro, nitroso, hydroxylamino or heterocyclyl, by reacting a nitro compound of formula
- 6
- wherein n and R are as defined, with hydrazine at elevated temperature in the presence of a solvent, in which process an aqueous base is used as solvent.
The compound 3-methyl-7-nitro-3H-isobenzofuran-1-one.
The use of a compound of formula I in the preparation of a herbicide of the isobenzofuranone type.
The use of 3-methyl-7-nitro-3H-isobenzofuran-1-one in the preparation of a herbicide of the isobenzofuranone type.
Dependencies are inferred from the claim text.